Electric heater



July G. N. FROLCK ELECTRIC HEATER Filed xsept. 29, '1922 arney:

Patented July 2K9, 1924.

UNITED STATES PATENT QFFICE.

GEORGE N. FROLICK, F BUFIAIL,r NEW YORK, ASSIGNDB T0 FRANK S. W'ENDLING',

` 0F CLEVELAND, OHIG.

ELECTRIC HEATER.

Application led September To all whom t may concern:

Be it known that I, GEORGE N. Freemen, a citizen of Germany, resident of Buialo, in the count of Erie and State of New York, have invented new and useful lmprovements in Electric Heaters, of which the following is a specification.

rlhis invention relates to an electric heater or lire place.

One of its objects is to provide an 1mproved heater of this character which is capable of producing a maximum quantity of heat with a minimum expenditure of electric power.

A further object is to provide'a simple and inexpensive heater which is so constructed as to be readily accessible for repairs to the electrical connections and other parts.

in the accompanying drawings:

-Figure 1 is a front elevation of a heater embodying my improvements. Figure 2 is a transverse vertical section on line, 2 2. Fig. 1. Figures 3 and et are horizontal sections on the correspondingly numbered lines in Fig. 1.

Similar characters of reference refer to like parts throughout the several views.

The main casing or body of the heater is constructed oi sheet metal and is preferahly of rectangular box-like form consisting of a top wall l0, a bottom wall il, side walls l2 and a rear wall 13, the front side o the casing being open. The top and adjoining sides of the casing preterterminate at their front edges in a marginal flange or border 14. v

Arranged with'n :this casing and suitably attached thereto is a heater shell which is closed on all sides except its front side and which is spaced from the walls ot said casing to torni an air space 15, as shown in Figs. 2 and 3. This shell consists of a rear wall 16 preferably of asbestos board or similar material, a top wall 17, a bottom wall 18 and side walls 19. As shown in the drawings, the. top and side walls of this shell are lfastened at their front ends to the corresponding walls 10, 12 of the casing hy screw bolts 20 or other appropriate iestenings, and the rear wall 16 of said shell is secured by screw bolts 21 to the adjoining portions ot' the top and side walls of said shell. The lower front side et the rear wall l5 is provided with a 29, 1922. Serial No. 591,217.

transverse bar or cleat 22 upon which the rear end o the bottom wall 18 of the heater shell rests. As shown in Fig. 2, said bottom wall 18 is spaced an appreciable distance from the corresponding bottom wall l1 of the casing and is provided at its front end with an integral depending portion or fender 23 for closing the space formed between said walls, this fender being attached at its ends to the adg'oining casing flange 14 hy bolts 2d.

Extending over the front face of the casing flange is a slip jacket 25 of substantially inverted U-shaped 'form whose outer marginal portions are crimped or bent over the corresponding edges of said iiange, as shown at 26, While their inner marginal portions are bent inwardly and are secured in place hy the holte 20.

Mounted on the front side of the rear wall 16 of the heater shell are the electric heating' elements 27 which may be of any suitable and well known construction and which are arranged in anelectric circuit including the feed wires 28 and a multiple heat switch 29 of ordinary construction. This switch is preferably mounted centrally of the fender 23 and is suitably held in place between the rear side of the latter and al strap 30 fastened to said tender. If desired, the heating elements may be em bedded in asbestos wool 31 to better retain the heat produced thereby.

The fender 23 is provided with a series of air inlet openings 32 and the top wall 17 of the heater shell is provided with a series of outlet openings 33, whereby the cold air is drawn from the door and is forced upwardly through the air space 15 where it becomes heated before it is discharged through said outlet openings* into the room. This construction promotes air circulation in the room in which' the heater is located and insures heating of the room in a minimum period of time and with a minimum expenditure of electric power.

rl"he open front side or the heater shell is provided with a guard or protective grating 84.- which is provided on opposite sides with rearwardly-extending pertorated ears which are adapted to be sprun over the ends of the holte 20 for removaly holding it in position.

As shown in Figs. 1, 2 and 3, the top, bottom and side walls of the heater shell pretldirecting the heat outwardly into the room.

In order to enable this heater to be placed against the side walls of a room without danger of scorching or burning them, the rear side of the heater casing is provided with a guard plate 36 which is spaced from the rear wall 13 of said casing. As shown, this guard 4plate extends substantially the full width and height of the casing and l1s provided with forwardly offset flanges 37 for attaching it to the rear wall of the cashould it be lnecessary to gain access to the electrical connections within the enclosed space 15, the bottom wall 18 of the heater shell together with its attached fender 23 is disconnected from the casing by removing the bolts 24.

I claim as my invention:

1. A heater of the character described, comprising a casingopen at its front side, a shell arranged in said casing and spaced from the walls thereof to form an air space the bottom wall of said shell being detachable and in spaced relation to the corresponding bottom wall of the casing and having a depending front portion for closing the space between said Walls, and an electric heating element mounted on the rear wall of said shell, the latter being provided at its upper and lower ends with air passages communicating with said air space.

2. Aheater of the character described, comprising a casing open at its front side, a

having forwardly offset shell arranged in said casing and spaced from the wallsthereof to form an air space, the top and side walls of said shell being joined adjacent their front ends to the corresponding walls of said casing to close the upper portion and adjoining side portions ofsaid air space, and the bottom wall of said shell having a depending portion for closing the lower portion of said air space, and an electric heating element mounted on the rear wall of said shell, said top'wall and the depending portion of said bottom wall having air passages communicating with said air space.

3. A heater of the character described, comprising a casing open at its front side, a shell arranged in said casing and spaced therefrom to form an air space extending from the bottom to the top thereof, the bottom wall of said shell being disposed above the bottom of the casing and provided with an integral depending fender extending to said casing bottom, means for detachably connecting said bottom wall and its fender to said casing, and an electric heating element mounted on the rear wall of said shell,

the upper portionkof the latter and saidfender having air passages communicating with said air. space.

4. A heater of the character described, comprising a casing, a heating element mounted in said casing, and a guard plate spaced from therear wall of said casing and tianges for attaching the plate to the casing.

GEORGE N. FROLICK. 

